Why were mass movements necessary in decolonization?

Correct answer: They gave broad support to the demand for freedom

The direct answer is A: mass movements gave broad support to the demand for freedom. Decolonization means ending foreign colonial rule and establishing self-government. A small group could express opposition, but a mass movement brought workers, students, farmers, women and other ordinary people into the struggle. Step by step: people joined meetings, protests, boycotts, strikes and other forms of action; their large participation showed that colonial rule lacked popular consent; this created political and economic pressure and made the demand for independence stronger. Option A is correct because it clearly describes this broad public support. Option B is wrong because mass movements generally challenged colonial authority, even though rulers sometimes tried to use or control them; they did not always strengthen colonial rule. Option C is wrong because the purpose was freedom, not increasing slavery. Option D is wrong because mass movements involved and mobilized people rather than keeping them away. Memory cue: mass movement means mass participation, and mass participation makes a freedom demand powerful.